EP3642901A1 - Interposer and substrate incorporating same - Google Patents
Interposer and substrate incorporating sameInfo
- Publication number
- EP3642901A1 EP3642901A1 EP18733701.9A EP18733701A EP3642901A1 EP 3642901 A1 EP3642901 A1 EP 3642901A1 EP 18733701 A EP18733701 A EP 18733701A EP 3642901 A1 EP3642901 A1 EP 3642901A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- interposer
- cavity
- substrate
- layer
- layers
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 14
- 239000002041 carbon nanotube Substances 0.000 description 14
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- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
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- 229910052710 silicon Inorganic materials 0.000 description 2
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P3/00—Waveguides; Transmission lines of the waveguide type
- H01P3/12—Hollow waveguides
- H01P3/121—Hollow waveguides integrated in a substrate
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P11/00—Apparatus or processes specially adapted for manufacturing waveguides or resonators, lines, or other devices of the waveguide type
- H01P11/001—Manufacturing waveguides or transmission lines of the waveguide type
- H01P11/002—Manufacturing hollow waveguides
Definitions
- the present invention relates to the field of microelectronics and more particularly to an interposer and a substrate incorporating the same.
- the present invention provides an interposer including one or more layers and a cavity defined in the one or more layers, the cavity being configured as a waveguide for propagation of electromagnetic waves.
- the present invention provides a substrate including first substrate layer, a second substrate layer, and an interposer in accordance with the first aspect between the first and second substrate layers.
- FIG. 1A is a schematic exploded view of a substrate incorporating an interposer in accordance with an embodiment of the present invention
- FIG. 1 B is a schematic top plan view of a first substrate layer of the substrate of FIG. 1A
- FIG. 1C is a schematic top plan view of a first electrically conductive layer of the substrate of FIG. 1A;
- FIG. 1 D is a schematic top plan view of a first interposer layer of the substrate of FIG. 1A;
- FIG. 1 E is a schematic top plan view of a second interposer layer of the substrate of FIG. 1 A;
- FIG. F is a schematic top plan view of a second electrically conductive layer of the substrate of FIG. 1 A;
- FIG. 1G is a schematic bottom plan view of a second substrate layer of the substrate of FIG. 1A;
- FIG. 1 H is a schematic cross-sectional view of the substrate of FIG. 1 A along a line A-A;
- FIG. 2A is a schematic top plan view of a substrate or waveguide structure incorporating an interposer in accordance with another embodiment of the present invention
- FIG. 2B is a schematic cross-sectional view of the substrate or waveguide structure of FIG. 2A along a line B-B;
- FIG. 3A is a schematic cross-sectional view of a substrate or waveguide structure incorporating an interposer in accordance with yet another embodiment of the present invention
- FIG. 3B is a graph of the reflection and transmission coefficients of the substrate or waveguide structure of FIG. 3A;
- FIG. 4A is a schematic cross-sectional view of a waveguide structure incorporating an interposer in accordance with still another embodiment of the present invention.
- FIG. 4B is a schematic top plan view of the waveguide structure of FIG. 4A along a line C-C;
- FIG. 4C is a graph of the reflection and transmission coefficients of the waveguide structure of FIG. 4A;
- FIG. 5 is a schematic cross-sectional view of a substrate or waveguide structure incorporating an interposer in accordance with yet another embodiment of the present invention;
- FIG. 6 is a schematic top plan view of an interposer in accordance with one embodiment of the present invention
- FIG. 7 is a schematic top plan view of an interposer in accordance with another embodiment of the present invention
- FIG. 8A is a schematic top plan view of an interposer in accordance with yet another embodiment of the present invention.
- FIG. 8B is a schematic partial cross-sectional view of the interposer of FIG. 8A along a portion of a line D-D;
- FIG. 9 is a schematic top plan view of an interposer in accordance with still another embodiment of the present invention.
- FIG. 10 is a schematic top plan view of an interposer in accordance with another embodiment of the present invention
- FIGS. 11A and 11 B are schematic top plan views of interposers in accordance with other embodiments of the present invention.
- FIG. 12 is a schematic top plan view of an interposer in accordance with yet another embodiment of the present invention
- FIG. 13 is a schematic top plan view of an interposer in accordance with still another embodiment of the present invention.
- FIG. 14 is a schematic top plan view of a layer of an interposer in accordance with still yet another embodiment of the present invention.
- FIG. 15A is a schematic top plan view of a substrate or waveguide structure incorporating an interposer in accordance with another embodiment of the present invention.
- FIG. 15B is a schematic cross-sectional view of the substrate or waveguide structure of FIG. 15A along a line E-E;
- FIG. 16A is a schematic cross-sectional view of a fabricated waveguide structure incorporating an interposer in accordance with yet another embodiment of the present invention.
- FIG. 16B is an optical image of the fabricated waveguide structure of FIG.
- FIGS. 16C through 16F are scanning electron microscope (SEM) images of the fabricated waveguide structure of FIG. 16A;
- FIG. 16G is a photograph of the fabricated waveguide structure of FIG. 16A undergoing characterization using coplanar waveguide (CPW) probes;
- FIG. 16H is a graph of the reflection and transmission coefficients of the fabricated waveguide structure of FIG. 16A. Detailed Description of Exemplary Embodiments
- the substrate 10 includes a first substrate layer 12, a second substrate layer 14 and an interposer 16 between the first and second substrate layers 12 and 14.
- the interposer 16 includes a plurality of layers 18 and a cavity 20 is defined in the layers 18, the cavity 20 being configured as a waveguide for propagation of electromagnetic waves.
- an antenna 22 and a first transmission line 24 are provided on a first surface 26 of the first substrate layer 12 and a via 28 extends through the first substrate layer 12, the second substrate layer 14 and the interposer 16.
- the first substrate layer 12 may be made of a dielectric material such as, for example, alumina, silicon, quartz, FR4 or polytetrafluoroethylene (PTFE), while the antenna 22 and the first transmission line 24 may be made of gold or other electrically conductive material.
- the via 28 is provided for direct current (DC) signals and may include a plurality of graphene layers for thermal management purposes.
- a first electrically conductive layer 30 is provided on a second surface 32 of the first substrate layer 12. As can be seen from FIG. 1 C, the first electrically conductive layer 30 is provided with a first opening 34 beneath the antenna 22 and a second opening 36 beneath the first transmission line 24.
- the first electrically conductive layer 30 may be made of gold or other electrically conductive material.
- the interposer 16 of the present embodiment includes a first interposer layer 38 and a second interposer layer 40. As can be seen from FIG. 1 D, the portion of the cavity 20 defined in the first interposer layer 38 is configured as a power splitter supporting electromagnetic wave propagation to the antenna 22 and the first transmission line 24. Correspondingly, as can be seen from FIG.
- the portion of the cavity 20 defined in the second interposer layer 40 is configured to provide a larger propagation volume underneath the antenna 22 and a slot 42 for electromagnetic excitation.
- the second interposer layer 40 having the slot 42 is provided to produce slow wave effect inside the interposer 16 and thereby advantageously allows for a reduction in the length and/or the width of the interposer 16. More particularly, provision of the second interposer layer 40 with the slot 42 in the interposer 16 increases permittivity and creates slow wave propagation which in turn reduces the size requirements of the cavity 20. In this manner, a slow-wave structure is provided in one of the layers 18, the slow-wave structure being in communication with the waveguide. More particularly, the slow- wave structure of the present embodiment includes the slot 42 defined in the second interposer layer 40.
- the interposer 16 in the embodiment shown is made up of two (2) layers 18, it should be understood by persons of ordinary skill in the art that the present invention is not limited by the number of layers making up the interposer 16.
- the interposer may be made up of one (1) or more layers 18.
- the present invention is also not limited by the arrangement of the layers 18.
- an interposer layer incorporating a slow-wave structure may be provided above one or more waveguide interposer layers in an alternative embodiment (see, for example, FIG. 4A described below).
- one or more waveguide interposer layers may be sandwiched between two (2) layers having slow-wave structures to distribute the slow wave effect (see, for example, FIG. 3A described below).
- each of the layers 18 of the interposer 16 is formed of a plurality of nanostructures 44.
- the nanostructures 44 of the present embodiment are elongate in shape and are arranged in parallel orientation to one another in each of the layers 18.
- a height H of the nanostructures 44 in each layer 18 corresponds to a thickness T of the each layer 18.
- the nanostructures 44 may be carbon nanotubes or metallic nanowires.
- the carbon nanotubes or metallic nanowires may be single-walled or multi-walled.
- the interposer 16 is also able to perform thermal management functions, provide electromagnetic shielding, achieve high quality factor, avoid radiation losses and facilitate slow wave propagation.
- interposer 16 may be fabricated, for example, using low-cost yet reliable carbon nanotube production processes.
- the interposer 16 may be etched or patterned using standard carbon nanotube or nanowire growth processes, lithography methods or transfer methods.
- three-dimensional (3D) printing methods or micromachining may be employed to form the interposer 16.
- a second electrically conductive layer 46 is provided on a first surface 48 of the second substrate layer 14. As can be seen from FIG. 1 F, the second electrically conductive layer 46 is provided with a third opening 50 beneath the slot 42 in the second interposer layer 40.
- the second electrically conductive layer 46 may be made of gold or other electrically conductive material.
- a second transmission line 52 is provided on a second surface 54 of the second substrate layer 14 in the present embodiment.
- the second substrate layer 14 may be made of a dielectric material such as, for example, alumina, quartz, silicon, FR4 or polytetrafluoroethylene (PTFE), while the second transmission line 52 may be made of gold or other electrically conductive material.
- PTFE polytetrafluoroethylene
- the interposer 16 acts not only as a traditional interposer realizing vertical connections via, for example, the via 28, but rather as a functionalized interposer 16 providing a smart substrate 10 within which electromagnetic wave propagation and one or more passive devices necessary to microwave signal processing and management are realized in an embedded air cavity 20 with electromagnetic shielding. More particularly, with the embedded air cavity 20, radio frequency passive functions are gathered inside the interposer 16, allowing for electromagnetic shielding whilst avoiding radiation losses. Moreover, having air as the propagating medium allows for low loss propagation and high quality factors and thermal dissipation of high power electromagnetic transmission is enhanced due to the good thermal conductivity of the nanotubes. Further advantageously, the width of the via 28 is substantially reduced due to the ability to create vias with aspect-ratios of greater than 20 using carbon nanotubes and the size of the interposer 16 and consequently the substrate 10 may also be reduced through the implementation of slow wave technology.
- the substrate or waveguide structure 80 includes a first substrate layer 84, a second substrate layer 86 and the interposer 82 between the first and second substrate layers 84 and 86.
- the interposer 16 includes a first interposer layer 88 and a second interposer layer 90 coupled to the first interposer layer 88.
- a cavity 92 is defined in the first and second interposer layers 88 and 90, the cavity 92 being configured as a waveguide for propagation of electromagnetic waves.
- the cavity 92 includes a slot 94 defined in the first interposer layer 88 and a channel waveguide 96 defined in the second interposer layer 90, the slot 94 being in communication with the channel waveguide 96.
- electromagnetic waves propagate from the first excitation line 98 through the slot 94 and the channel waveguide 96 in the interposer 82 to a second excitation line 100.
- the substrate or waveguide structure 60 includes a first substrate layer 64, a second substrate layer 66 and the interposer 62 between the first and second substrate layers 64 and 66.
- the interposer 62 includes a first layer 68, a second layer 70 and a third layer 72.
- a cavity 74 is defined in the second layer 70, the cavity 74 being configured as a waveguide for propagation of electromagnetic waves.
- a slow-wave structure in the form of a first slot 76 defined in the first layer 68 and a second slot 78 defined in the third layer 72 is provided in the first and third layers 68 and 72, the slow-wave structure being in communication with the waveguide.
- the results of the simulation demonstrate that a cut-off at a lower frequency of about 35 Gigahertz (GHz) is attainable with the substrate or waveguide structure 60 and the interposer 62 of the present embodiment.
- GHz Gigahertz
- the waveguide structure 200 includes a first substrate layer 204, a second substrate layer 206 and the interposer 202 between the first and second substrate layers 204 and 206.
- the interposer 202 includes a first layer 208 and a second layer 210.
- a cavity 212 is defined in the first layer 208, the cavity 212 being configured as a waveguide for propagation of electromagnetic waves.
- a coplanar line 214 is provided on the first substrate layer 204, a first slot 216 is defined in the second layer 210, a second slot 218 is provided with the second substrate layer 206, and an antenna 220 is provided in the cavity 212.
- electromagnetic waves propagate from the antenna 220 through the cavity 212 in the interposer 202 and then through the first and second slots 216 and 218.
- the provision of the coplanar line 214 and the second slot 218 on the same side of the waveguide structure 200 facilitates testing of the waveguide structure.
- the antenna 216 is an excitation pillar.
- the antenna provided in the cavity 210 may be a slot, a planar antenna or a coaxial.
- the results of the simulation demonstrate that a cut-off at a lower frequency of about 36 Gigahertz (GHz) is attainable with the waveguide structure 200 and the interposer 202 of the present embodiment.
- GHz Gigahertz
- the substrate or waveguide structure 300 includes a first substrate layer 304, a second substrate layer 306 and the interposer 302 between the first and second substrate layers 304 and 306.
- the interposer 302 includes a first layer 308 and a second layer 310.
- a cavity 312 is defined in the first layer 308, the cavity 312 being configured as a waveguide for propagation of electromagnetic waves.
- a first transmission line 314 and a second transmission line 316 are provided on the first substrate layer 304.
- the cavity defined in the one or more layers of an interposer may be configured to include one or more of a splitter, a coupler, an antenna feed, a filter, a phase shifter and a crossover.
- an interposer 110 having a cavity 112 configured to include a Y-splitter 114 is shown.
- an input antenna 116 and a plurality of output antennas 118 are provided in the cavity 112.
- the Y-splitter 114 may be provided in a single layer of the interposer 110.
- an interposer 120 having a cavity 122 configured to include a four-way coupler 124 is shown.
- an input antenna 126 and a plurality of output antennas 128 are provided in the cavity 122.
- the four-way coupler 124 may be provided in a single layer of the interposer 120.
- FIG. 8A illustrates an interposer 130 having a cavity 132 configured to include an array antenna feed 134 for a plurality of antennas 136 positioned on top of a substrate (not shown), and FIG. 8B, a partial cross-sectional view of the interposer 130 along a portion of the line D-D, illustrates that the cavity 132 may have a greater depth at a portion below one of the antennas 136.
- an input antenna 138 is provided in the cavity 132.
- an interposer 140 having a bend 142 provided in the waveguide 144 is shown.
- provision of the bend 142 in the waveguide 144 allows for a change of direction of the electromagnetic waves that propagate through the waveguide 144.
- a bend of 90° is provided in the waveguide 144.
- the present invention is not limited by the angle of the bend.
- a bend of greater or less than 90° may be provided depending on substrate requirements.
- FIG. 10 illustrates an interposer 150 having a cavity 152 configured to include a single cavity filter 154
- FIGS. 11A and 11 B illustrate interposers 160 and 170 each having a cavity 162 and 172 configured to include a multiple cavity filter 164 and 174
- FIG. 12 illustrates an interposer 180 having a cavity 182 configured to include a filtering multiplexer 184.
- an input antenna 146 and one or more output antennas 148 are provided in the respective cavities 144, 152, 162, 172 and 182.
- Each of the waveguide 144, the single cavity filter 154, the multiple cavity filters 164 and 174 and the filtering multiplexer 184 may be provided in a single layer of the respective interposers 140, 150, 160, 170 and 180.
- an interposer 220 having a cavity 222 configured to include a hybrid coupler 224 is shown.
- a first input antenna 226, a second input antenna 228, a first output antenna 230 and a second output antenna 232 are provided in the cavity 222.
- the first output antenna 230 may be arranged to provide the sum of signals input via the first and second input antennas 226 and 228 and the second output antenna 232 may be arranged to provide the difference between the signals input via the first and second input antennas 226 and 228.
- the present invention is not limited by the number or position of the input and output antennas provided in the hybrid coupler 224. The number and position of the input and output antennas of the hybrid coupler 224 are dependent on application requirements.
- the hybrid coupler 224 may be provided in a single layer of the interposer 220.
- an interposer 186 having a cavity 188 configured to include a Butler matrix 190 is shown.
- the Butler matrix 190 includes a plurality of couplers 192 coupled together by a crossover 194 and a plurality of delay line phase shifters 196.
- the Butler matrix 190 may be provided in a single layer of the interposer 186.
- an interposer 250 having a cavity 252 configured to include a ridge waveguide 254 is shown.
- the ridge waveguide 254 of the present embodiment includes a ridge 256 provided in the cavity 252.
- the interposer 250 is provided with an input antenna 258 in the cavity 252 and an output slot 260.
- the ridge waveguide 254 may be provided in a single layer of the interposer 250.
- the cavity 252 is shown to have a rectangular cross-section, it should be understood by persons of ordinary skill in the art that the present invention is not limited to a particular cross-sectional shape. In alternative embodiments, the cavity 252 of the ridge waveguide 254 may, for example, be square shaped.
- the fabricated waveguide structure 400 includes a first substrate layer 404, a second substrate layer 406 with the interposer 402 between the first and second substrate layers 404 and 406.
- the interposer 402 is formed of a single layer and a cavity 408 is defined in the layer, the cavity 408 being configured as a waveguide for propagation of electromagnetic waves.
- the walls of the interposer 402 are made of vertically aligned carbon nanotubes (CNTs) and a metal cover serves as the second substrate layer 406 enclosing the fabricated waveguide structure 400.
- the fabricated waveguide structure 400 is fed in and out with first and second probes or excitation pillars 410 and 412 formed of carbon nanotubes that are respectively connected to first and second coplanar waveguide (CPW) access lines 414 and 416 for taking measurements using coplanar probes (not shown).
- the fabricated waveguide structure 400 has a height of 20 microns (pm) and the first and second probes or excitation pillars 410 and 412 function as antennas.
- FIG. 16B an optical image of the fabricated waveguide structure 400 without the metal cover is shown.
- the black portions are formed of vertically aligned carbon nanotubes, whilst the remaining portions are formed of gold.
- the fabricated waveguide structure 400 is closed with the metal cover (not shown).
- FIGS. 16C through 16F scanning electron microscope (SEM) images of the fabricated waveguide structure 400 are shown. More particularly, FIG. 16C shows a partial top plan view of the fabricated waveguide structure 400 without the metal cover, FIG. 16D shows a perspective view of the fabricated waveguide structure 400 without the metal cover, FIG. 16E shows a further enlarged, partial perspective view of the fabricated waveguide structure 400 without the metal cover, and FIG. 16F shows a further enlarged perspective view of one of the first and second excitation pillars 410 and 412 of the the fabricated waveguide structure 400.
- the excitation pillar 410 or 412 has a height of 210 ⁇ and a width of 200 pm.
- reflection coefficients and transmission coefficients of the fabricated waveguide structure 400 are measured using coplanar waveguide (CPW) probes connected to a Network Vector Analyser (not shown) as shown.
- CPW coplanar waveguide
- the measurements taken clearly show waveguide propagation behaviour (high pass filter behaviour) with a cut-off frequency at 50GHz in accordance with the simulations.
- the present invention provides an interposer that can alleviate some miniaturisation issues and a method of forming the interposer.
- the interposer of the present invention it is possible to realize a fully packaged system, optimized and personalized to be fitted on a motherboard with other devices such as, for example, active devices, Monolithic Microwave Integrated Circuits (MMIC), micro-electromechanical systems (MEMS), on top of the interposer.
- MMIC Monolithic Microwave Integrated Circuits
- MEMS micro-electromechanical systems
- the interposer of the present invention is advantageous in that it allows incorporation of one or more microwave functions inside the interposer and the one or more microwave functions incorporated therein are advantageously electromagnetically shielded by the interposer, thereby avoiding radiation losses.
- the propagating medium inside the interposer is air, low loss propagation and high quality factors may be achieved.
- patterns with different shapes may be easily created inside the interposer to realize various passive microwave functions such as, for example, power coupling, radio frequency duplexing, power splitting, phase shifting and radio frequency filtering using additive manufacturing technologies, micromachining, or nanowire or carbon nanotube growth technologies.
- carbon nanotube and metallic nanowire fabrication methods are low cost and can be used to produce high density nanotubes that are lightweight compared to metallic structures. These may also be used to produce patterns with small dimensions that are difficult to obtain with mechanical machining techniques. This is advantageous for high frequency applications as dimensions of a device decrease with an increase in frequency requirements.
- interposer is formed of carbon nanotubes
- three-dimensional thermal channelling and thermal dissipation of high powered electromagnetic transmission are enhanced due to the high thermal conductivity of the carbon nanotubes. It is also possible to realise vias with small diameters in such embodiments due to the high aspect ratio of the carbon nanotubes. Additionally, slow-wave technology may be implemented inside the interposer to reduce the dimensional requirements of the interposer by increasing the effective permittivity inside the cavity.
- the interposer of the present invention may be used in three dimensional
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- Control Of Motors That Do Not Use Commutators (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SG10201705250QA SG10201705250QA (en) | 2017-06-23 | 2017-06-23 | Interposer and substrate incorporating same |
PCT/SG2018/050251 WO2018236286A1 (en) | 2017-06-23 | 2018-05-23 | Interposer and substrate incorporating same |
Publications (2)
Publication Number | Publication Date |
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EP3642901A1 true EP3642901A1 (en) | 2020-04-29 |
EP3642901B1 EP3642901B1 (en) | 2022-12-14 |
Family
ID=62713059
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP18733701.9A Active EP3642901B1 (en) | 2017-06-23 | 2018-05-23 | Interposer and substrate incorporating same |
Country Status (4)
Country | Link |
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US (1) | US11264688B2 (en) |
EP (1) | EP3642901B1 (en) |
SG (1) | SG10201705250QA (en) |
WO (1) | WO2018236286A1 (en) |
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CN110718732B (en) * | 2019-10-28 | 2021-07-02 | 南京邮电大学 | Substrate integrated slow wave air waveguide for improving performance of microwave passive device |
CN111540719B (en) * | 2020-07-09 | 2020-10-13 | 杭州臻镭微波技术有限公司 | Multi-TSV millimeter wave vertical interconnection structure with spiral strip lines connected in series |
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KR102230651B1 (en) * | 2013-06-21 | 2021-03-22 | 삼성전자주식회사 | Optical interconnection for stacked integrated circuit |
US10475732B2 (en) | 2013-07-12 | 2019-11-12 | Taiwan Semiconductor Manufacturing Co., Ltd. | 3DIC package integration for high-frequency RF system |
FR3009431A1 (en) * | 2013-07-31 | 2015-02-06 | Inst Polytechnique Grenoble | RECTANGULAR WAVE GUIDE WITH SLOW WAVES |
-
2017
- 2017-06-23 SG SG10201705250QA patent/SG10201705250QA/en unknown
-
2018
- 2018-05-23 US US16/624,067 patent/US11264688B2/en active Active
- 2018-05-23 WO PCT/SG2018/050251 patent/WO2018236286A1/en active Application Filing
- 2018-05-23 EP EP18733701.9A patent/EP3642901B1/en active Active
Also Published As
Publication number | Publication date |
---|---|
SG10201705250QA (en) | 2019-01-30 |
EP3642901B1 (en) | 2022-12-14 |
WO2018236286A1 (en) | 2018-12-27 |
US11264688B2 (en) | 2022-03-01 |
WO2018236286A8 (en) | 2019-04-04 |
US20200153074A1 (en) | 2020-05-14 |
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